Furnace structure



G. GROH FURNACE STRUCTURE Filed June 10 1918 e Sheets-Shet 1 [maven/Zanzye 6707?).

.Aug.28,l923. L466J60 G. GROH FURNACE STRUCTURE Filed June 10 1918 SSheets-Sheeci 3 a Q Q -uuuuuuu A" v 2 I b /:Z3

' Aug. 28, 1923. 1,466,160.

(3. GROH FURNAGE STRUCTURE Filed June 10 1918 6 Sheets-Sheeti D El D U BU k U u 3 dcmClClClUl'J 'UDDDU'IUDU is! Go izye Grok. M

filter, e21.

6 Sheets-Sheet 5 I IIIII IIIIIIIIII|||l||ll|| |lll MUGMZOI" G. GROH FURNACE STRUCTURE Filed June 10 1918 Aug. 28, 1923.

Geo

Aug.28, 1923. 1,466,160

G. GROH FURNACE STRUCTURE Filed June 10 1918 6 Sheets-Sheet [n van for:

Patented Aug. 28, 1923'.

nsirse [stares GEORGE eaoH,"-on s'r. Louis, nissounrnssrenes OE ONE- HALF, renew/i 11 BAS'IIAN OF ST.

LOUIS, IIIISSOUBI.

nunimon srnucrunn. f

Y Application filed. June 10,

in'Furnace Structures, of whichthe following a specification. I My invention relates: to lmprovements 1n furnace structures more particularly used for providing heat-for treating suchsubstances, for instance, as asphaltu1n,roofingpitch, mineral rubber, oil andturpentineand has for its object to. provide a structure which will separate the frame after leaving the fire-box to evenly distribute the 'heat' therefromunder a still or boiler and thereby prevent burnlng out of the bottom of the still or boileras usual with the ordinary furnace structure and which isdue to the flame coming into direct contact with the bottom ofthe still or boiler. r A further object of the invention is to provide a furnace structure thatwill be simple, durable and practical, and a fuel saver over the usual type of furnace for similar purposes. i v

A still further object ofthe invention is to generally improve the structure of furnaces used for the purposes herein set out, and to overcome certain important practicalobjec' tions to, and defects in, the usual and well known used. With the above and other objects in view, the invention consists in certain novel features of construction, arrangements and com bination of parts as will be more fully d8.- scribed hereinafter and finally pointed out inthe claims hereto appended. v

Referrinp; to the accompanying drawings forming part of this specification wherein like characters of reference denote similar parts throughout the several views Fig. 1, is a vertical longitudinal sectional View of a furnace structure constructed in accordance with my invention.

Fig. 2, is a sectional view taken on line A-A of Figure 1.

Fig. 8, is a sectional view taken on line of Figure 1.

a Fig. 4, is a sectional v C@ of Figure 1.

Fig. 5, is'a transverse vertical sectional view of the furnace'taken on line vIL-D of Figure 1.

Gnoi-r, a citi-.

furnace structure now generally cross-wall 15.

w taken on line- 1915. Serial 1101239433.

Fig. 6, is a transverse vertical sectional view of-thefurnace taken on line of Figural. Fig. '7', is a transverse vertical sectional view of the furnace taken on line F-F of Figure 1. I i v 1 Fig. 8,'is afront elevation of the furnace. My furnace structure consists of the two side walls 1, the front end wall'2 and the rear end wall The two side walls 1 are enlarged, as shown in Figures 2 and 3, to a predetermined elevation, at their front ends designated 4,; to form the side walls of the ash pit 5 havingthe front, opening 6 and the fire-boxer fuel chamber? having the front opening 8. The rear end of the fire-' box 'Z'inay or may not be provided with the bridge wall 9 as desired, the top of which," when used, is preferably at an elevation to about the center of the fire-bOX'S, as shown in Figure 1. Thefurnaceis shown as provided with a grate 10, 'althoughthis grate is not necessary when burning either coal,

wood or coke or other fuel as it can be placed directly into the ash'pit. Theashpit opening '6 is provided with the usual type ofdoor 11,an d the fire-boxopening 8 is provided with the usual type of doorlQ, as shown in Figure 8. is

A suitable flame spreading wall 18 is positioned a suitable distance directly to the rear ofthefire-box 7 and is provided with the diverging-wings 14 to direct the flame outwardly and *rearwardlyq. The flame spreading wall is considerably higher than the bridge-wall 9, as clearly shown in Figure 1, although it may be any desired height.

15 represents a cross-wall united at each end with the side-walls 1 and forming the rear wall of a combustionchamber A which is formed between the bridge-wall and the The upper end 16 of the cross-wall 15 is wider than the remainder of the wall and extends rearwardly therefrom, as shown in Figure 1.

Extending inwardly a suitable distance from each side wall 1 is awving-wall 1? to provide the smoke passage lstherebetween and to form the vertical smoke chamber or passage 19"between the cross vall 15 and the wing-walls 17 having two upper openin gs 20 arranged at each end of the top eX- tension 16 ofthe cross-wall 15. "A short-mo wardly extending wall 21 is arranged upon. 1 Y

the top of the wall 15 and at each endof in opposite rear rel-Q 'andthe wing-walls 17, as shown in Fig- ,uresl and 7.

The wingwalls 17, are nar rowed at their upper ends to form the front walls of the fines-22 and 23. A. suitable wall, in the form of a ledge 27 rests upon the arch 26, as shown-in Figure 1 to close the heating chamber 13 at the rear. The still or boiler 28 may be supported within the walls of the furnace structure in any suitable manner desired. The lowerend of each flue wall 24 and is provided with a smoke passage 29 and 30, respectively, which passages each communicate at one end with the smoke passage 18 and at their opposite ends with the outlet smoke-Hues 22 and 23, respectively.

The enlarged side wall portions 4, as shown in l igures 3 and 5, are each providedwith a longitudinal cold air intake passage 31 communicating at its rear end with the combustion chamber A. A plurality of horizontal passages 32 communicate at their outer ends with each. cold air intake passage 31 and at their inner 'end's with the fire-box near the top of each side wall thereof, as shown in Figures 3 and 5.

A plurality ofupwardly and outwardly extending passages 38 communicate at their lower ends with each cold an lntake passage 31. and at their upper ends with the heating space between the bottom of the still 28 and the top of enlarged wall portions 4 which is a part of the heating chamber B.

A suitable arch 3st spans thefire-box 7, and is supported at its side edges by the inclined surfaces 35 of the enlar ed side wall C portions 4. The arch 34 is provided along each supporting edge with a plurality of suitably space-d {lame outlet openings 36. A flame directing -rib 37 is formed upon the top surface of the arch 34L opposite each inclined surface 3501?: the enlarged side wall portions 4. These ribs 37 prevent the flames leaving the lire-box 7 which pass upwardly through the openings 36 from coming directly into contact with the bottom of the still 28 thereby preventing the bottom of the still 28 from burning out from "that cause. i

A suitable arch 38 spans the combustion chamber A. The front end thereof extends to the rear end of the arch 3st and the rear end oft-he arc-h 38 extends to the cross-wall The arch-is supported along each of its sides by means of the, side walls 1 of the furnace structure, ure 6.

as clearly shown in Fig' The arch 38 is provided throughout its length and preferably near each side edge thereof, with a plurality of slanting smoke and flame outlet openings or passages v39. The openings 39 preferably become gradually smaller in area toward the rear 'endof the arch so that the greater amount of '8 flames and smoke may pass upwardly through the larger openings at the forward end of the arch and into the heating chamber B formed between the still 28 and the arch 88; This form of arch structure more evenly distributes the heat to the bottom of the: still. than when this type of perforated arch is not employed. 1'

A horizontally disposed coldair. l passage 40 is formed upon the upper surface of the arcl cs 84 and 38 preferably midway between their side supporting edges, as clearly shown in Figures 1, 5 and 6. Cour municating with the cold air duct 40' are a plurality of vertically disposed cold air outlet openings 41 whichare disposed directly below the longitudinal center line 'ofpthe boiler or still 28. 2 The cold air. openings 41. gradually become larger at the .rear end of the furnace, as shown. The cold. air duct all) passes through the front wall 2 and is provided with a door or closure 42, as shown in Fi ures 1 and 8.

The cold air ducts or passages 31 are also closed at their frontends by means of suitable doors or closures 4:3, as shown in Fig ure 8.

The front wall 2 is provided with a pair of peek-holes 44 disposed on eachside of the cold air passage 4&1 which are closed at their outer ends by means of suitable closures or doors L5. By looking through these peelcho'les it is possible to see how the flames are acting within the furnace, especially in the heat chamber B below the still 28 and above the arches 34 and 38.

It will be seen that when a fire is started in the fire-box or fuelchamber 7 that the flames will travel rearwardly in the combustion chamber A and strike the [lame spreading wall 13 where the flame will be divided and travel rearward and upward in two paths along thesi'de walls 1 of the furnace. The flames and smoke will leave the combustion chamber A by passing ii wardly through "the openings 39 in the arch 38 and enter the heating chamber 1% below. the still 28 and above the arch 38. The smoke and flames by passing through these openings evenly distribute the temperature under the still 28 and they leave the heating chamber B by passing downwardly throi 5-11" the corner openings 20, entering. sin l chamber 19 and the-npassage 1'8 -andfina passing through the openi11gs 29 and 30'- pass upwardly through the smoke outlet fines 22 and 23 respectively. It will. here.

act or and smoke pass upwardly through thei'passages 36, on eachside of the firebox 7 and enter the forward end of the heating chamber B, as is apparent from Figure -5 of the drawings. I

If the flame becomes too intense in thefire-box 7 of thefurnace, it may be checked by opening the-doors 43 and allowing air to pass through passages 31 and 32. and into the fire-box above the flames. At the same time cold airwill find its way through passages 33 and into the heating chamber along each sidethereof.

If it is desired to d 'ectcold air directly into the heating chamber B. for cooling the space below the still 28, the doorv a2 is opened and the cold; air will be drawn into the duct or passage tOand be directed upwardly through the openings 41 against the.

bottom of the still 28, which part of the still naturally becomes the hottest and burns out first due to sediment etc. settling at. the bet-- 7 tom of the still.

I am aware that arious slight-changes may be made in the -(ODSt-ill(jt1()l1 and ar rangement of, parts herein described, .and illustrated in the drawings, hence I reserve the right to make any such changes may fairly fall within the scope'of the 'ap iended claims when fairly construed;

What I claim is: I

1. In a furnace st'ructure'of the class described, a still, an arched structure having a series of flame and smoke'opcnings, said. still and the arched structure forming, conjunction with'the Walls ofthe furnace, a. fuel chamber, a combustion chamber, a

heating chamber and smoke outlet flucs, said.

heating chamber being arranged between the bottom half of the still and said arched structure, a flame spreader arranged in the combustion chamber to therear of the fuel chamber means ferdividing and equalizing the flamesandsmoke as they pass from he combustion chamber into the. heating chamber to establish a substantially uniform temperature underithc v ntire length of the still,

said heating chamber comnrmnicatingwith the smoke outlet fines and means for direct.- ing cold air intotheheating chamber below the bottom of the still., r 1

2. In a furnacestructure of the class described, a still, an arched structure, said still 7 and the arched structure forming, in conjunction with the walls of the furnace, a heating chamber between the bottomlialf of the still and saidarched structure, a. fuel chamber'and combustion chamber below the arched structure and smoke outlet flues the rear corners of thefurnace structure.- a flame and smoke spreader arranged in the combustion chamber, means for dividing and equalizing the flames-andsmoke as they eating chamber to establish asubstantially pass from thecombustion chamber into the uniform temperature under the entire length i of the still, said heating chamber COIIRIIHIIP eating With the smokeoutletflues, means for directing cold air into the heating chamber below the-still and me ansfor directing cold air into the fuel chamber, combustion cham-; ber and heating chamber simultaneously.

'3. In a furnace structure: of the class escribed, a still, an arched structure, said stilland equalize the-flames and smoke as they:

pass upwardly from the-fuel chamber and combustion chamber into the heat ng chain ber to'esta'blish a substantiallyuniformt perature under the still, "said heatin charm ber communicating with a smoke; chamber arranged to thefrear: of the. combustion chamber, .and said smoke chamber commie nicatinglwith the smoke outlet fines, and

means'for directing cold air into the heating chamberbelow the. still. I V j 4. In a furnace structure of. the class described, a still, an arched structure, said still and the archedstructure forming, in conjunction with the walls .ofthe furnace, a fuel chamber, a. combustion chamber, a heating chamber and smoke outlet lines at the rearcorners of the furnace structure, said heating chamber being arranged between the bottom half of the still'and said arched structure, said arched structure being so constructed as to divide and equalize the flames and smoke as they pass upwardly from the fuel, chamber and combustion.

cold'air into the heating chamber below the still and meansfor directing 'coldair into the fuel chamber,-combustion chamber and heating'chamber simultaneously. 5. In a furnace structureof he class described, a still, an arched structure, said still and thearchedstructure forming, in conjunction withthe walls of the furnace, a fuel chambeiya combustion chamber, a-heat-. ing-chamber and smoke outlet fluesat the rear corners of" the furnace structure, said. heating, chamber being :arranged between. the bottom half ofthe still andsaidarched structure, saidarched: structure being so constructedf as to divide and equalize the flames and smoke as. they passiupwardly from the combustionchamber into the'heatintroducing cold air into the heating cham; ber' directly below the longitudinal center" of the still.-

ing chamber to establish a substantially uniform temperature under the still, said heating chamber communicating with a smoke chamber formed at the rear of the combustion chamber, said smoke chamber communicating with the smoke'outlet' flues, means for directing cold air into the fuel chamber from one side thereof, and means for 6. In a .furnaceistructure of the class described, a still, an arched structure, sarcl still and the archedstructure form1ng, 1n con-.-

junction with the walls of the furnace a fuel chamber, a combustion chamber, a heatv Y ing chamber and smoke outlet flues at the constructed as to divide and equalize the rear corners of the furnace structure, said heating chamber I being arranged between the bottom half of the still and said arched structure, said arched structure being so.

flames and smoke as they pass upwardly from the combustion chamber nit-o, the lreating chamber to establish a substantially uniform temperature under the still, said heating chamber communicating with "the' 7. In a furnace structure of the class described, a still, an arched structure, said still' and the arched structure forming, in conjunction with the walls ofthe furnace, a

fuel chamber, a combustion chamber, a heating chamber and smoke outlet flues at the rear corners of the furnace structure, 'a

r flame spreader at the forward end of the combustion chamber, said arched structure belng arranged above the fuel chamber and the combustion chamber and provided with flame and smoke outlet 0 enin s formedv therein along each side edge thereof, said heating chamber being arranged below the still and above the fuel chamber and combusti on chamber, said heating chamber hav ing communication with the smoke outlet flues arranged at the rear corners of the furnace structure, said furnace structure being provided with cold airinlet passages arranged on each side of the fuel chamber and v,

communicating therewith to permit cold air to be introduced simultaneously into the fuel chamber and into the heatin-gch'ambe r when it is desired to check the flames.

:8. In a furnace'structure of the class dc scribed, a still, an arched structure, said still neeareo and the arched structure'- forming, in conjunction with the walls of the furnace, a

fuel chamber, a combustion chamber, a heating' chamber and smoke outlet fines at the rear corners of the furnace structure, said arched structure being -arranged above the fuel chamber and combustion"chamher and having flame and smoke outlet openings formed therein along each side edge thereof, said heating chamber 7 being arranged below the still and abovethe arched structure, said heating chamber con municating with the upright smoikefioutmt flues arranged at the rear corners of the furnace structure, sa id vfurnace structurebeing provided with cold air {inlet passages ara V ranged on each si deof the fuel chamber communicating therewith to permit cold air to be introduced simultaneously into'the fuel chan'iber, combustionchamber and heat r" chamber 'when desired to check the flames therein, said arched structure being provided with a cold air passage arranged above-the fuel chamber and combustion chamber-and 7 below the still to permit the introduction of col'dair into the heating chamber below the longitudinal center of the still for coo n-ig the bottom of the still. V

5). In a furnace structure of the classy-de scribed, a still, an arched structure said still and the arched structure forming, in conji'inction with the Walls of the furnace, a fuel chamber, a combusticnchamber, a heating chamber and smoke outlet fines at the rear corners of the furnace structure, said fuel chamber being arranged at the forward end of the furnace below the arched structure, said combustion chamber be-ingfermed to the rear of the fuel chamber and communicating therewith, said heating chamber being formed between the arched structure and the bottom of the stilLsai-cl arched structure having a series of openings therein and separating s'a'rd heating chamber from said combustion c'hamber to permit names; and smoke to travel upi v'ardly into the heating chamber from the combustion chamber through the openings of the arched 'struc tur'e, said heating chamber communicating with the smoke outlet flues arranged at the rear corners of the furnace, said arched structure being providedwith acold air inlet duct arranged below the still, a closure for one end of said air inlet duct, said air inlet duct being provided with a series of air outlet openings adapted to permit the inrus'h of cold air against the bottom of the still when the closure 7 7 opened.

'10. In a furnacestructure of'the class d'e-l arched structure, said still scribed, a still, an and the arched structure forming, inconjunction withthe walls of v fuel chamber, a combustion chambenfa heat ing chamber and smoke outletflues-at the for saidair inlet duct is the furnace, at

lee

rear corners of the furnace structure, said fuel chamber being arranged at the forward end of the furnace, said combustionchamher being formed to the rear of the fuel chamber and having communication therewith, said heating chamber being formed below the still and above said arched struc ture, said arched structure having a series of flame and smoke openings therein and separating said heating chamber from 'the combustion chamber, said heating chamber communicating with the smoke outlet flues arranged at the rear corners of the furnace, said arched structure being provided with a cold air inlet duct arranged below the vstill, a closure for said air inlet duct, said air inlet duct being provided with a cold air inlet I duct arranged below the still, a closure for said air inlet duct, said air-inlet duct being provided with a series of air outlet openings to permit the inrush' of cold air when the closure is opened against the bottom of the still and each side wall of'the fuel chamber being provided with a cold air inlet passage having communication with the combustion chamber and a plurality of air inlet openings for introducing the cold air into the fuel chamber near the top thereof, said cold GEORGE GROH. 

